Introduction

Welcome to Google App Engine! Creating an App Engine application is easy, and only takes a few minutes. And it's free to start: upload your app and share it with users right away, at no charge and with no commitment required.

Google App Engine applications can be written in the Python 2.7, Java, Go or PHP
programming languages. This tutorial covers Python 2.7. If you would prefer to
use Java, Go or PHP to build your applications, see the
Java,
Go or
PHP guides.

By the end of the tutorial, you will have implemented a working application, a simple guest book
that lets users post messages to a public message board.

Run/Modify

While going through this tutorial you will see buttons that allow you to test the code
sample right in your browser in the
Google Cloud Playground.
These are labeled "Run/Modify."
You can even make changes to the code and see the results in real-time!

Get set up

Before we continue, you will need to download the
Google App Engine Python SDK,
which includes a web server application that simulates the App Engine environment, and tools to
deploy your application to the App Engine production environment. Follow the directions for your
operating system, then come back here so we can get going!